在低压电网中，两相短路时的短路电流等于同一地点三相短路电流的一半。
查看答案
在无限容量系统中，周期分量假想时间等于短路延续时间。
A. 对
B. 错
I owe aof thanks to him because his support helped me overcome that difficulty.
A. respect
B. resposibility
C. duty
D. debt
Many people are ready to help you, but, to some, you must be on your own in most cases.
A. reason
B. extent
C. amount
D. goal
You have to make a decision by yourself because you arefor yourself.
A. prepared
B. honest
C. responsible
D. decided
微信支付 
支付宝支付